Exam-style question
Try this first
What happens first in CSMA/CA before a wireless device transmits data?.
- A.The device checks whether the channel is clear
- B.The device detects a collision after transmitting
- C.The access point disables the SSID
- D.The device adds every MAC address to an allow list
Model answer
What a good answer should say
- The device checks whether the channel is clear
Explanation
Why this works
Carrier Sense Multiple Access with Collision Avoidance requires a device to sense the channel before transmitting. If the channel is busy, the device waits rather than transmitting immediately.
Common mistake
No common mistake is linked to this question yet.